Gungnir, Dragon of the Ice Barrier

Level 7 WATER/Dragon Synchro Effect
2500 ATK / 1700 DEF

1 Tuner + 1 or more non-Tuner WATER monsters
Once per turn: You can discard up to 2 cards to the Graveyard to target the same number of cards your opponent controls; destroy them.

Rulings – Yugipedia

Printings:

Duel Terminal 3: DT03-EN040 (Duel Terminal Ultra Parallel Rare) - 2010-09-25
Hidden Arsenal 3: HA03-EN030 (Secret Rare) - 2010-12-02
Hidden Arsenal 5: Steelswarm Invasion: Special Edition: H5SE-EN002 (Super Rare) - 2012-03-30
Structure Deck: Freezing Chains: SDFC-EN044 (Super Rare) - 2021-02-18
Hidden Arsenal: Chapter 1: HAC1-EN053 (Duel Terminal Ultra Parallel Rare) - 2022-02-24

Prices:

Cardmarket: 0.25 €
TCGplayer: $ 0.21